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Raymond. B
"Heel was killing me by Friday. Felt pretty good to get my boots off and put this thing on.”
ShiftLock™ 3-Zone Cooling
Built for us, by us
Made by a construction family
I worked construction. My dad still does, and his heels have been giving him grief for years.
Every night he'd sit on the couch with a frozen water bottle under his foot. It melted, it dripped, and it only cooled one spot. So we made something better for the end of the day.
The founder,
Built for the jobsiteFree shipping on 2+
The Kolda ShiftLock™ Ice Sleeve
Cold recovery for feet that work 10-hour days on concrete.
- Cools heel, arch & ankle at once
- Hands free. Pulls on like a sock
- Sized by your work boot
Powered by ShiftLock™ 3-Zone Cooling
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- Takes the heat out of worn-out feet after a shift
- ShiftLock™ locks cold onto your heel, arch and ankle
- Pulls on like a sock. No straps, no ice packs to hold
- Hands free. Stays put while you put your feet up
- Sized by your work boot size
- Free shipping on 2+. Packed fast and tracked to your door
- Built for jobsite feet, not runners' feet. ShiftLock™ covers all 3 load zones
- Soft gel that wraps the heel, arch and ankle
- Bends to your foot, even straight from the freezer
- Wipes clean after a dirty day
- Splits or leaks in 12 months? We send a new one
- 1Toss it in the freezer before work
- 2Boots off, sock on. 20 minutes with your feet up
- 3Back in the freezer, ready for tomorrow
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1 sleeve – $79.95+ SHIPPING
Built for us, by us
Made by a construction family
I worked construction. My dad still does, and his heels have been giving him grief for years.
Every night he'd sit on the couch with a frozen water bottle under his foot. It melted, it dripped, and it only cooled one spot. So we made something better for the end of the day.
The founder,
How ShiftLock™ cooling works
Chill the sleeve, then pull it on. A continuous layer of gel wraps around your foot and ankle, cooling the areas it touches.
Made for the end of a long shift
For crews on their feet 10 to 12 hours a day on concrete. Freeze it before work, put it on when the boots come off.
Twenty minutes, feet up
Cold across the heel, arch and ankle after a full day in steel-toe boots.
Stays put on its own
No frozen bottle, no towel, no drips. It holds its place while you rest.
Sized by your work boot
A stretch gel shell that pulls on easily, even when feet are swollen at clock-out.
30-Day Guarantee · Free shipping on 2+
Feet pounding by the drive home?
Ten hours on concrete does the same thing to everyone. Sound familiar?
- Your boots feel a size smaller by 2pm
- The first steps after you sit down are the worst
- A frozen water bottle helps for ten minutes, then drips on the couch
- You've started to think it's just getting older
It isn't age. It's the load. Your feet just need cold, in the right places, every night.
Why Your Feet Feel Wrecked by Clock-Out
What 10 hours in work boots on concrete does, and the 20-minute fix.
1The job
10 to 12 hours on concrete
A jobsite slab has no give. Every step, every ladder climb and every lift lands on your feet, five or six days a week.
One construction worker put it simply: "I wear my boots 6-7 days per week, approximately 12-15 hours per day."
1
2
3
4
2Why it hurts
Your boots protect your toes, not your feet
- 1Heavy steel toe. More weight to lift with every step.
- 2Thin, flat factory insole. Very little arch support.
- 3Concrete. No give, all day long.
- 4Heat and pressure build under the heel and along the arch.
About half of workers in steel-toe boots reported heel pain in one study. Source
3Where it lands
One small pad takes your whole weight
Under your heel bone is a small cushion of fat, with a tough band running along your arch to your toes.
On concrete, they take your full body weight with every step. By the end of the day, that's where you feel it.
4It builds all day
Fine at 6am. Pounding by 4pm.
The load adds up hour by hour. That's why your feet feel fine in the morning and throb on the drive home.
6amStart of shift
9amFirst break
1pmAfter lunch
4pmClock-out
5The fix
20 minutes of cold when the boots come off
Pull it on, put your feet up, and let ShiftLock™ 3-Zone Cooling lock cold onto your heel, your arch and your ankle.
Heat-map illustration. Cold recovery for tired feet, not a medical treatment.
Why not just use a frozen bottle?
Most of us start with whatever's in the freezer. Here's how the Kolda Sleeve, powered by ShiftLock™, stacks up.
6 of 6 for Kolda. The next best, a strap-on wrap, gets 3.
30-Day Guarantee · Free shipping on 2+
Compared with common at-home options, not a specific brand.
Hands FreeSized by Boot20-Minute ColdShiftLock™ 3-Zone CoolingLeak-TestedPulls On in SecondsFree Shipping30-Day Guarantee
Why the Kolda Sleeve Wins? Feature by Feature
ShiftLock™ 3-Zone Cooling
Cold gel locks onto the heel, the arch and the ankle at once, and stays cold for about 20 minutes.
Pulls On Like a Sock
No straps, no loose ice packs, no towel. Pull it on, put your feet up, done.
Built Like Work Gear
Tough stretch fabric and sealed gel. If it splits or leaks in 12 months, we replace it.
Two Socks, No Waiting
Like rotating two pairs of boots. One on your feet, one in the freezer, ready for tomorrow.
Ice That Fits Your Foot, Not a Runner's
Most ice packs are made for sports injuries and slide off. This one is sized by your work boot size and pulls on like a sock, so it stays put on worn-out, puffy feet.
Heel to Ankle, All at Once
A frozen water bottle only cools the spot you're rolling. The gel runs under your heel, along your arch and around both sides of your ankle, so the whole area gets cold at once.
Straight From the Freezer
Freeze it before work. Pull it on when the boots come off. Properly cold, on the tailgate or on the couch, for about 20 minutes.
Frequently Asked Questions
You got questions. We got answers.
What is ShiftLock™ 3-Zone Cooling?
It's how the sock works. Gel sits in three zones: around your heel (Heel Zone), along your arch (Arch Zone) and around your ankle (Ankle Ring). The front of your foot and your toes stay free. The stretch fit holds it flat against your skin, because cold only moves where it touches. No air gaps, no sliding off, 20 minutes hands free.
How does it go on a puffy foot?
It's stretchy and pulls on like a sock. If your feet are swollen, fold the top down, get it over your heel, then roll it up.
How long does it stay cold?
About 20 minutes, which is the right amount after work.
How long does it take to freeze?
About 2 hours. Easiest way: toss it in the freezer before work and it's ready when you get home.
What sizes do you have?
Two. L fits US men's 6 to 9 (women's 7 to 10.5). XL fits US men's 10 to 13 (women's 11+). The size guide is right by the Add to Cart button.
Is it a cure?
No magic bullet. It's after-shift recovery. Use it with good boots and rest. If something's really wrong, see a doctor or physical therapist.
Does it leak?
The gel is sealed inside. If it splits or leaks in the first 12 months, we send a new one.
How does the 30-Day Guarantee work?
Use it for 30 days from delivery. If you don't think it's worth it, email us within 30 days of delivery and send it back for a refund of the product price. See our Refund Policy for the details. This is on top of your legal rights as a consumer.
How fast is shipping?
Free shipping on 2 or more sleeves. We pack orders fast and email your tracking link the moment it ships.
Try it for 30 days. Love it or your money back.
Wear it after every shift for 30 days. If your feet don't feel the difference, email us and send it back for your money back.
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Real Reviews Real Workers
✓ Verified purchase
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Oscar S.
“Got it for my heel but I actually like the cold under the front of my foot more. Didn’t expect that.”
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Phil O.
“Fits fine. Bit of a tug getting it over my heel the first time.”
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Mike R.
“Bought 2, one for each foot. I like these better than my regular compression sleeves after work. The cold helps and my feet feel a bit better by the time I take them off.”
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Jessica L.
“Wish it stayed cold a little longer. My husband’s been using mine after his shifts so I guess he likes it too.”
